Electron JS- Native capabilities

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<script> 
//It prints the process version of chrome, node, electron installed 
   for (const type of ["chrome", "node", "electron"]) {
     console.log(process.versions as any)[type]);
   }
 //electron running process id 
 console.log(process.pid);
 
 //Current running os 
 console.log(process.platform);
 
 //arguments passed can be accessed in below variables
 console.log(process.argv);
 
 //environment variables showing system environment variables
 console.log(process.env);
 
 //prints current execution path
 console.log(process.execPath);
 
 //It prints cpu usage like { percentCPUUsage: 0, idleWakeupsPerSecond: 0 }
 console.log(process.getCPUUsage());
</script> 

    btn.addEventListener("click", (ev: Event) => {
        ipcRenderer.send("showFolderDialog");
    });

 ipcMain.on("showFolderDialog", (event: IpcMainEvent) => {

    let fileSelectionPromise = dialog.showOpenDialog({properties: ["openFile", "openDirectory", "multiSelections"]});
    fileSelectionPromise.then(function(obj) {
        //now for each folder path, get all the files inside it..  
        let cumfileslist = obj.filePaths.map((filePath, index)=>{
          return fs.readdirSync(filePath, {withFileTypes: true})
                   .filter(dirent=>!dirent.isDirectory())
                   .map(dirent=>filePath + "/" + dirent.name);
        }).reduce((filesacc, files) => {
            filesacc = filesacc.concat(files);
            return filesacc;
        }).every((absolutefilepath, index, array) => {
          let stats:fs.Stats = fs.statSync(absolutefilepath);
          event.sender.send("fileslist", path.basename(absolutefilepath), stats);//sending back to renderer process
          return true;
        });
    });
  });

  ipcRenderer.on("selectedfolders", (evt: IpcRendererEvent, selectedfolders: string[]) => {
     const selectedFolderElem: HTMLInputElement = document.getElementById("selectedfolders") as HTMLInputElement;
     selectedFolderElem.value = selectedFolderElem.value !== "" ? selectedFolderElem.value + "|"
                                                            : selectedFolderElem.value ;
     selectedFolderElem.value += selectedfolders.join(" | ");
   });